STUDIES ON INFECTIOUS LARYNGOTRACHEITIS VIRUS VACCINE II- THE EFFECT OF INCUBATION TEMPERATURE ON THE PATHOGENICITY OF I.L.T. VIRUS (FOR CHICKEN EMBRYOS INOCULATED BY THE ALLANTOIC SAC ROUTE) | ||||
| Assiut Veterinary Medical Journal | ||||
| Article 9, Volume 25.1, Issue 49, April 1991, Page 82-86 PDF (1.82 MB) | ||||
| Document Type: Research article | ||||
| DOI: 10.21608/avmj.1991.208393 | ||||
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| Authors | ||||
| SUSAN TOLBA; I. REDA; SALWA EL-ASEL Y; ELHAM EL-EBIARY; A. EL-SONOSI; NARGES BARHAUMA | ||||
| Abstract | ||||
| The incubation of chicken embryos inoculated with original vaccinal strain at different temperature 34°C, 37°C and 40°C had a considerable influence on the pathogenicity of virus inoculated embryos: 1- The mortality index for chicken embryos (MICE) of the original vaccinal strain when the embryos were incuabted at 34°C, 37°C and Joc were 0.072, 0.028 and 0.46 respectively. 2- One passage of thevirus at 34°C kept thevirus pathogenicity at an indices of 0.05, 0.067 and 0.166 for temperatures of 34°C, 37°C and 40°C respectively. 3- One passage of the virus at 37°C resulted in pathogenicity indices of 0.0, 0.029 and 0.5 for 30C, 370c and 400C and 40°C res pectively. 4- One passage of the 'virus at 40°C resulted in a virus which showed MICE of 0.11 and 0.44 when embryos were incubated at 34°C, 37°C and 40°C respectively. | ||||
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